1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 1 of 5 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS- L-6512 Former Designation: TMS-6512 TITLE: Foam and Sponge, Static Sealing CURRENT REV No.: 1606 DATE: June 2016 WRITTEN/EDITED BY: A. Hasan APPROVED BY: R. Goluch SUPERSEDES: Rev. 1410 Oct 2014 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specific
3、ation may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior
4、to use. 1.0 APPLICATION This specification covers two general types of die cut foam or sponge for static sealing applications which can be further specified by material. The first are flexible semi-closed cell foams suitable for sealing systems where restricted air flow is desired. The second is exp
5、anded rubber or sponge where the material must be closed cell or exhibit properties associated with closed cell rubber materials. This specification also covers three grades of non-connected cellular polyvinyl chloride product. 2.0 SCOPE This specification covers the general requirements, property a
6、nd performance requirements, and source approval and quality control. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwi
7、se specified, the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 MPAPS L-6510 PSTC-31 CFR Title 29, Part 1910 ASTM C972 PSTC-2 NAVISTAR Manufacturing Std
8、. MS-D-13 ASTM D1056 FMVSS 302 NAVISTAR Engineering Design Std A-16 ASTM D1564 NAVISTAR MPAPS B-50 MPAPS P-9543 MPAPS K-6929 ASTM D1667 ASTM D3574 MPAPS G-5 MPAPS P-9544 MPAPS GT-31 4.0 REQUIREMENTS 4.1 Classification and Construction Type designations are used to specify the application in the syst
9、em and the allowed materials that can be used to meet those requirements. Suffix designations are used to specify the specific materials and hardness required for the application. Pressure sensitive adhesives may be specified on the engineering drawing and meet the requirements herein. NUMBER: MPAPS
10、 L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 2 of
11、7 4.1.1 Types 4.1.1.1 Type 1 Semi-permeable foam or sponge. This is typically used where low flange sealing pressures are present and a small amount of moisture absorption is not an issue. Typical applications include HVAC components, transmission covers, and electrical covers. Typical materials inc
12、lude vinyl, low permeability urethane, micro cellular urethane and silicone. 4.1.1.2 Type 2 Closed cell expanded rubber. This is typically used for exterior sealing applications with higher flange pressures though some softer materials are available. Typical materials include EPDM, blends of SBR and
13、 CR and silicone. 4.1.1.3 Type 3 Non-connected cellular polyvinyl chloride product with a pressure-sensitive adhesive on one side, protected with a release paper. This is intended for use as a compression seal that inhibits the passage of air, water, and dust in assembled joints or components. This
14、type is divided into three classes. 4.1.2 Materials Grades A through C may are usually associated with Type 1 applications; Grades D through F are usually Type 2; and Grades G and Z with either please contact Materials Engineering and supplier if other combinations are desired. If only a type is spe
15、cified, then any appropriate material is acceptable that will work in the application. Selection of material and determination of its suitability should be done in consultation with Materials Engineering. 4.1.2.1 Grade A Vinyl 4.1.2.2 Grade B Low permeable urethane foam 4.1.2.3 Grade C Micro cellula
16、r urethane foam 4.1.2.4 Grade D EPDM elastomer 4.1.2.5 Grade E SBR blends 4.1.2.6 Grade F CR blends 4.1.2.7 Grade G Silicone elastomers 4.1.2.8 Grade Z Materials not currently listed above, so designate polymer type in engineering note. 4.1.3 Classes (Type 3 only) 4.1.3.1 Class I (Firm) this materia
17、l is formulated to seal under high compressive forces experienced in mechanically fastened assemblies, such as riveted joints in cab construction. 4.1.3.2 Class II (Medium) this material is formulated to seal where medium compressive forces are experienced and where irregularities on mating surfaces
18、 are encountered. This product is recommended for application where dimensional stability is necessary on thin wall die-cut parts. 4.1.3.3 Class III (Soft) this material is formulated to seal where light compressive forces are experienced and greater irregularities and tolerances are encountered. 4.
19、1.4 Hardness Grades Various hardness grades are available in many of these materials. In general, hardness shall follow ASTM D 1056 conventions for compression force deflection ranges. When specified, the hardness grade shall be noted parenthetically at the end of the note. NUMBER: MPAPS L-6512 TITL
20、E: Foam and Sponge, Static Sealing REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 3 of 7 Grade Comp
21、ression Deflection at 25% Deflection kPa psi 0 Less than 15 Less than 2 1 15 35 2 5 2 35 65 5 9 3 65 90 9 13 4 90 120 13 17 5 120 170 17 - 25 4.2 Material Requirements The following material properties shall be determined by the methods indicated in ASTM D 1056, with the exception of Type 3 material
22、s. 4.2.1 Grade A Vinyl 4.2.2 Grade B Low permeable urethane foam no grade designations; shall meet MPAPS L-6510. 4.2.3 Grade C Micro cellular urethane foam 4.2.4 Grade D EPDM elastomers 4.2.5 Grade E SBR blends 4.2.6 Grade F CR blends 4.2.7 Grade G Silicone elastomers 4.2.8 Type 3 shall consist of n
23、on-connected cellular polyvinyl chloride resin base foam, with a suitable pressure-sensitive adhesive on one surface, protected with an easy release liner paper. When compressed a min of 30%, this material is designed to produce a satisfactory seal. 4.2.9 Pressure Sensitive Adhesives Generally, adhe
24、sives supplied to this specification only need to adhere until assembly is complete (as a seal in compression does not usually need an adhesive). In those cases where better, more durable performance is required then the adhesive shall meet MPAPS K-6929. In both cases the adhesive needs to survive t
25、he environment the seal is intended for without causing any detrimental effects to the performance of the seal. Please contact Materials Engineering if further guidance is required. 4.2.9.1 For Type 3, the adhesive shall be of a long-aging high tack contact adhesive formulation. 4.2.10 Release Paper
26、 (Type 3 only) this product is manufactured so that as the foam material is unrolled, the adhesive surface is expose and the release paper remains on the adhesive free surface. Release paper shall remain with the tape and be removed after application. This paper shall release easily and cleanly from
27、 the foam. 4.2.11 Color (Type 3 only) shall be black unless otherwise specified. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Supp
28、liers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 4 of 7 4.2.12 Barrier Coating Type 3 Class II material is available with a low friction barrier coating on the non-adhesive side to reduce friction and grab between the foam and mating surface. When material is
29、applied around a fixed surface and a movable surface, such as a door or service cover, this coating should be specified on the part drawing. 4.3 Performance Requirements Type 3 ONLY 4.3.1 Compression: ASTM D 1667 - 50% Compression or ASTM C972 Force to Compress Compression Deflection Class I 69.0-96
30、.6 kPa (10.0-14.0 psi) 34.5-69.0 kPa (5.0-10.0 psi) Class II 41.4-69.0 kPa (6.0-10.0 psi) 34.5-69.0 kPa (5.0-10.0 psi) Class III 20.7-41.4 kPa (3.0-6.0 psi) 10.4-27.6 kPa (1.5-4.0 psi) NOTE: Force to compress is instantaneous value. Compression deflection value after one minute deflection. 4.3.2 Den
31、sity: (ASTM D 1667) Class I 0.160 g/cm (10 lbm/ft) min Class II 0.128 g/cm (8 lbm/ft) min Class III 0.096 g/cm (6 lbm/ft) min 4.3.3 Tensile: (ASTM D 3574, PSTC-31) Class I 275 kPa (40 psi) min Class II 170 kPa (25 psi) min Class III 55 kPa (8 psi) min 4.3.4 Elongation: (ASTM D 3574, PSTC-31) Class I
32、 100% mi Class II 100% min Class III 100% min 4.3.5 Adhesion: (PSTC-2) Class I 109 N/m width (10 ozf/in width) min Class II 109 N/m width (10 ozf/in width) min Class III 109 N/m width (10 ozf/in width) min NOTE: Sample may be reinforced by applying masking tape to non-adhesive side. 4.3.6 Water Abso
33、rption 4.3.6.1 Method Compress 30% a weighed sample 101.6 mm (4 in) square between stainless steel plates. Submerge at room temperature under a 50.8 mm (2 in) head of water for 22 hours. Remove sample, carefully blot all surfaces with an absorbent paper towel, and reweigh. Calculate weight change as
34、 water absorbed by volume. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 201
35、6 by Navistar, Inc. JUNE 2016 Page 5 of 7 4.3.6.2 Required Class I 4% max Class II 4% max Class III 6% max 4.3.7 Low Temperature Flexibility 4.3.7.1 Method condition a 150 mm (6 in) long specimen four hours at -29.0 1C (-20 2F). Bend sample 180 around a 6.4 mm (1/4 in) mandrel at the test temperatur
36、e. 4.3.7.2 Required All classes - no cracking. 4.3.8 Compression Set 4.3.8.1 Method ASTM D 1667 at 70 1C (158 2F) for 22 hours. Ply sample to 12.7 mm (1/2 in) min thickness. Measure set 30 minutes after load has been released. 4.3.8.2 Required All Classes - 90% max set. 4.3.9 Staining 4.3.9.1 Method
37、 Apply sealant on a typical steel or aluminum test panel and spray paint per NAVISTAR MPAPS G-5, Grade -19 (white) and cure paint for 20 minutes at 150C (300F). Subject test specimen to 250 hours per MPAPS GT-31, Method E. 4.3.9.2 Required Shall not discolor the painted surface and compare favorably
38、 with the adjoining painted metal surface. 4.3.10 Flammability Resistance Material and parts supplied to this specification shall conform to and be certified by the suppliers to meet the requirements of the latest issue of the Federal Motor Vehicle Safety Standard 571.302 - Flammability of Interior
39、Materials, and all requirements of MPAPS P-9544. 5.0 QUALITY All product supplied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product performance. 5.1 Qualification Material and processes submitted for approval to this specification shall include the following: 5.1.1
40、Report: A detailed and signed test report documenting testing to this specification prepared as per MPAPS P-9543. The report will include actual test data not merely test summaries. 5.1.2 Failure Modes: Test samples or photographs showing failure modes for each destructive test as necessary to fully
41、 describe those failure modes. Descriptions are adequate if the mode is easily understandable (no jargon) and not unexpected. Unexpected failure modes shall be described or pictured as completely as possible. 5.1.3 Test Procedure: The procedure used for preparing, curing and assembling materials for
42、 test. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc.
43、JUNE 2016 Page 6 of 7 5.1.4 Analysis: A detailed analysis of the test results including assumptions made, unexpected results and an explanation of any non-compliant results. 5.2 Submission The material test report shall be submitted to: Manager of Materials Engineering Materials Engineering and Tech
44、nology Dept. 10400 W. North Avenue Melrose Park, IL 60160 6.0 QUALIFICATION Engineering qualification of sources is required in advance of production shipments. Suppliers shall submit samples for approval of finish, luster, color and appearance to the Navistar Industrial Design Group. Samples shall
45、be accompanied by test data certifying that all requirements of the specification have been met. Upon approval, styling master samples denoting the minimum level of acceptable appearance quality shall be developed and retained by the supplier and the quality department of each using NAVISTAR facilit
46、y. 6.1 Quality Control Plan A Quality Control Plan for products supplied to the requirements of this specification will be established by mutual agreement between NAVISTAR and the supplier. Unless specific exception is noted, the following characteristics, where applicable*, shall be included in the
47、 plan as features for management by statistical process control.* * Other characteristics for inclusion in the control plan may be specified on the engineering drawing and/or purchase order. * See NAVISTAR Engineering Design Standard A-16 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirem
48、ents All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR will also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers must main
49、tain their certification with an accredited registrar and must furnish copies of registration certificates to their Corporate Buyer upon request. 7.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes in formulation
